When we speak of arthrodesis, we refer to fixing various segments of the spinal column, for this, pedicle screws associated with bars that can adopt the shape of the spine are used.
Screw arthrodesis is usually necessary in conditions such as spondylolisthesis, spondylosis, and scoliosis. In general, it is necessary when there are significant instabilities in some segments of the spine.
They can also work in degenerative disc diseases, provided they are accompanied by an intersomatic disc.
It is the most common problem in spinal surgery.
The placement of screws without discs does not work correctly in approximately 40% of cases, because, on the one hand, by blocking that segment a lot, it sends a lot of work to the adjacent discs and, on the other, because the screws either break too often, or they create slack and micromotion within the vertebrae. can be very painful.
Patients fear losing mobility in their spine after arthrodesis, although this is not truly the case. 90% of the work of bending over is done by the hips. For this reason, before surgery with arthrodesis, the risks are more the slack caused by the screws and the workload at adjacent levels. That is why we never tire of repeating that an arthrodesis indicated to the right patient after a good diagnosis is a good solution as long as an interbody cage or disc is placed.
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